Side element of a shoe upper



FIG. 1 is a side view of the engagement element showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a back side view thereof; and,

FIG. 6 is a bottom view thereof.

The dotted line outline of a shoe upper and a shoe sole in FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a side element of a shoe upper, as shown and described. 